Display device
OwnerYuzo Hisatakeinventor
Life of this patent
Estimating the term…
Abstract
When a peak wavelength of light emerging from a light-emitting layer is λp(k) (k=1, 2, . . . , m in an order from a smallest wavelength), the peak wavelength λp(k) is less than a value ne(k)P(k) that is obtained by multiplying an extraordinary-ray refractive index ne(k) of a selective reflection layer that forms each selective reflection region by a helical pitch P(k), and is greater than a value no(k)P(k) that is obtained by multiplying an ordinary-ray refractive index no(k) by the helical pitch P(k). A relationship, ne(k−1)P(k−1)<no(k)P(k), is established between the selective reflection layers that form the selective reflection regions.
Claims18
A display device including a reflecting layer, a light-emitting layer, a ¼ wavelength plate and a polarizer plate, the ¼ wavelength plate being positioned between the polarizer plate and the light-emitting layer, and the light-emitting layer being positioned between the ¼ wavelength plate and the reflecting layer, the display device comprising:
- selective reflection layers that are disposed between the ¼ wavelength plate and the light-emitting layer, include liquid crystal molecules that are aligned with a predetermined helical pitch, pass first circularly polarized light, and reflect second circularly polarized light that has a polarity opposite to a polarity of the first circular polarized light and has a predetermined wavelength,
- wherein the light-emitting layer has at least one peak wavelength, and the selective reflection layers include an m-number of selective reflection regions when the number of peak wavelengths is m,
- when a peak wavelength of light emerging from the light-emitting layer is λp(k) (k=1, 2, . . . , m in an order from a smallest wavelength), the peak wavelength λp(k) is less than a value ne(k)P(k) that is obtained by multiplying an extraordinary-ray refractive index ne(k) of the selective reflection layer that forms each selective reflection region by a helical pitch P(k), and is greater than a value no(k)P(k) that is obtained by multiplying an ordinary-ray refractive index no(k) by the helical pitch P(k), and
- a relationship, ne(k−1)P(k−1)<no(k)P(k), is established between the selective reflection layers that form the selective reflection regions.
A display device including a reflecting layer, a light-emitting layer, a color filter, a ¼ wavelength plate and a polarizer plate, the ¼ wavelength plate being positioned between the polarizer plate and the color filter, and the color filter being positioned between the ¼ wavelength plate and the light-emitting layer, the display device comprising:
- selective reflection layers that are disposed between the ¼ wavelength plate and the color filter, include liquid crystal molecules that are aligned with a predetermined helical pitch, pass first circularly polarized light, and reflect second circularly polarized light that has a polarity opposite to a polarity of the first circular polarized light and has a predetermined wavelength,
- wherein light that is emitted from the light-emitting layer and transmitted through the color filter has at least one peak wavelength, and the selective reflection layers include an m-number of selective reflection regions when the number of peak wavelengths is m,
- when a peak wavelength of light emerging from the color filter is λp(k) (k=1, 2, . . ., m in an order from a smallest wavelength), the peak wavelength λp(k) is less than a value ne(k)P(k) that is obtained by multiplying an extraordinary-ray refractive index ne(k) of the selective reflection layer that forms each selective reflection region by a helical pitch P(k), and is greater than a value no(k)P(k) that is obtained by multiplying an ordinary-ray refractive index no(k) by the helical pitch P(k), and
- a relationship, ne(k−1)P(k−1)<no(k)P(k), is established between the selective reflection layers that form the selective reflection regions.
A display device comprising a reflecting layer, a light-emitting layer, a selective reflection layer, a ¼ wavelength plate and a polarizer plate, which are disposed in the named order,
- wherein the light-emitting layer includes a first light-emitting layer that emits light with a single first peak wavelength, and a second light-emitting layer that emits light with a single second peak wavelength, and
- the selective reflection layer passes first circularly polarized light, reflects second circularly polarized light that has a polarity opposite to a polarity of the first circular polarized light and has a predetermined wavelength, and includes a first reflection layer that includes liquid crystal molecules aligned with a first helical pitch corresponding to the first peak wavelength and reflects the second circularly polarized light of a predetermined wavelength including the first peak wavelength, and a second reflection layer that includes liquid crystal molecules aligned with a second helical pitch corresponding to the wavelength of the second light-emitting layer and reflects the second circularly polarized light of a predetermined wavelength including the second peak wavelength.
A display device including a reflecting layer, a light-emitting layer, a ¼ wavelength plate and a polarizer plate, the ¼ wavelength plate being positioned between the polarizer plate and the light-emitting layer, and the light-emitting layer being positioned between the ¼ wavelength plate and the reflecting layer, the display device comprising:
- a selective reflection layer that is disposed between the ¼ wavelength plate and the light-emitting layer, passes first circularly polarized light, and reflects second circularly polarized light that has a polarity opposite to a polarity of the first circular polarized light and has a predetermined wavelength,
- light that is emitted from the light-emitting layer has at least one peak wavelength λp, and
- the selective reflection layer reflects light corresponding to a specified wavelength range including the peak wavelength λp.
Dependencies are inferred from the claim text.